Question 677137
{{{3s+50 >=100}}}
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{{{3s >= 100-50}}}
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{{{3s >= 50}}}
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{{{3s/3 >= 50/3}}}
{{{s >= 16.67}}}
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{{{highlight_green(s>= 17)}}}
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Check, with 16 sales, 
3(16)+50 = 98, not the desired 100
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Check, with 17 sales
3(17)+50 = 101, just over the desired 100
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